14 



BELL SYSTEM TECHNICAL JOURNAL 



power consumed in it during operation is .75 k. w. It is guided by 

 the hooks J. The filament leads are shown at K, K and are led 

 through the glass by the copper disc seals L, L. The grid is a molyb- 



-Q 



K- 



-K 



z'' 



Fig. 9 



denum helix and is supported by the molybdenum rods M which are 

 fixed to the lavite block E and slide on the outside of the lavite block 

 F. The whole structure is mounted on the flare R by means of the 



